Archival Odorless Mediums and Solvents evaporate more slowly than turpentines, resulting in a minimum of vapor during painting sessions. They are based on fast-drying alkyd resins, which outperform "traditional" mediums and are healthier to use.

Odorless Fat Medium — Recommended for experienced painters who work all day on the same painting, this syrupy, heavy-bodied liquid medium contains high solids to promote faster, more thorough drying of oils, and increase gloss and flow for enamel-like effects. It can also be added to Lean Medium if a more glossy effect is desired. Odorless Fat Medium generates very little vapor, resulting in healthier and more pleasant painting sessions.